<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
	function calculateAge (currendate, Birthdate)
	{
		var age=(currendate - Birthdate);
		alert(currendate);
		alert('You are' + age + 'years old');
	}
</script>
<title>Documento sin título</title>
</head>
<form>
<input type="text" id="currendate" />
<input type="text" id="birthdate" />
<input type="button" value="click" onclick="calculateAge(document.getElementById('currendate').value, document.getElementById('birthdate').value);"  />

</form>
<body>
</body>
</html>
